<template>
  <div class="father">
    <h3>父组件</h3>
    <h4>a: {{ a }}</h4>
    <h4>b: {{ b }}</h4>
    <h4>c: {{ c }}</h4>
    <h4>d: {{ d }}</h4>
    <Child :a="a" :b="b" :c="c" :d="d" v-bind="{ x: 100, y: 200, updateA: updateA }" />
  </div>
</template>

<script setup lang="ts">
import Child from './Child.vue'
import { ref } from 'vue'
// 适合 爷爷 <---> 孙子 双向通信
let a = ref(1)
let b = ref(2)
let c = ref(3)
let d = ref(4)

function updateA(value: number) {
  a.value = value
}
</script>

<style scoped>
.father {
  background-color: rgb(165, 164, 164);
  padding: 20px;
  border-radius: 10px;
}
</style>
